JP2005280914A - Hydraulic jack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pantograph type hydraulic jack which is utilized as a rescue equipment by attaching an attachment thereto. <P>SOLUTION: In the hydraulic jack having a pantograph type link body 3, an accessory tool to utilize the turn of a connection part of a lower arm 31 and an upper arm 32 which constitute the link body 3 is attachably/detachably provided on the upper arm and the lower arm. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an improvement of a hydraulic jack having a pantograph type link body.

  Conventionally, as a rescue device for rescuing people trapped in buildings or buried in rubble due to earthquake disasters, or rescuing people trapped in cars due to automobile accidents, hydraulic spreaders that open narrow gaps, etc. In addition, hydraulic devices such as hydraulic cutters for cutting wires and iron plates are known.

  These hydraulic devices have been proposed in various sizes with different outputs depending on the object. As a small and excellent portable device, as disclosed in Patent Document 1, an operating mechanism such as a spreader and a cutter, a hydraulic operating unit that operates the operating mechanism with a hydraulic cylinder, an electric hydraulic unit, There is a type that has an integrated battery. In addition, there is a large type with a large output, in which an engine-driven hydraulic unit is connected separately by a hydraulic hose, and an operation mechanism unit and a hydraulic operation unit are held and used.

  On the other hand, a compact and lightweight hydraulic jack having a pantograph type link body 3 shown in FIG. 3 as disclosed in Patent Document 2 is commercially available. It is mainly used for jacking up passenger cars and is much easier to operate than a screw-type in-vehicle jack used in many passenger cars, so it is relatively popular in ordinary households.

  As shown in FIG. 4, the principle of the pantograph type hydraulic jack includes a pressure oil supply / discharge portion 1 and a jack portion 2, and the pressure oil supply / discharge portion 1 pumps the operation lever 11 to the hand pump 12. While the oil from the tank 13 is made into pressure oil by operation and supplied to the jack part 2, the oil supplied to the jack part 2 by the opening operation of the stop valve 14 is returned to the tank 13.

  And the jack part 2 has the hydraulic cylinder 22 and the link body 3, and when the hydraulic oil from the hydraulic oil supply / discharge part 1 is supplied to the pressure chamber R, the hydraulic cylinder 22 extends and the link The structure is such that the body 3 stands up. In addition, when the oil in the pressure chamber R is returned to the pressure oil supply / discharge section 1, the hydraulic cylinder 22 contracts and the link body 3 contracts.

  The link body 3 includes a pair of lower arms 31 whose base ends are pivotally supported by the base 21, a pair of upper arms 32 whose base ends are pivotally supported by the respective distal ends of the lower arms 31, and the upper arms 32. The upper end bracket 33 which comprises the upper end of the link body 3 is supported, supporting the front-end | tip of each.

  The tip of the upper arm 32 forms a tooth shape, and the tip of the upper arm 32 is set to mesh with each other. The pair of lower arms 31 and the upper arm 32 can undulate in synchronization.

  A rod head 24 coupled to the upper end of the rod 23 of the hydraulic cylinder 22 disposed on the base 21 and a pair of lower arms 31 are linked by pivotally supporting a pair of link members 34.

Therefore, when the rod 23 of the hydraulic cylinder 22 extends upward, the lower arm 31 can be raised and lowered via the link member 34. That is, the link body 3 can be expanded and contracted by the expansion and contraction of the hydraulic cylinder 22.
JP 2002-78988 A JP 2001-348193 A

  Conventional hydraulic spreaders and hydraulic cutters are very useful in times of disaster or accidents, but are not widely used in ordinary homes because they are dedicated devices, and are mainly equipped with fire stations and local governments. Or a company that uses it for purposes such as SDF or construction. For this reason, in the event of a disaster or accident, a general person cannot rescue using a hydraulic spreader or the like, and waits for rescue by a rescue team. Moreover, once a large-scale disaster occurs over a wide area, there is a concern that the absolute number of rescue equipment will be insufficient.

  Furthermore, in the hydraulic device disclosed in Patent Document 1, a power source for charging the battery is required, and there is a possibility that it cannot be used during a power failure. In addition, there is a disadvantage that hydraulic equipment using an engine-driven hydraulic unit cannot be used without fuel.

  The present invention has been made in view of the above problems, and can be used as a rescue device or the like by detachably attaching an accessory tool to a pantograph type hydraulic jack purchased in a general household. With the goal.

  According to the first aspect of the present invention, in the hydraulic jack having the pantograph-type link body 3, an accessory tool that uses the rotation of the connecting portion between the lower arm 31 and the upper arm 32 constituting the link body 3 is connected to the lower arm 31 and the upper arm. It is characterized in that the arm 32 is detachably provided.

  The invention of claim 2 is characterized in that a spreader attachment is provided as the accessory tool. Here, the spreader attachment refers to an attached tool having a function of opening a narrow gap by utilizing the rotation of the connecting portion of the link body 3.

  The invention of claim 3 is characterized in that a cutter attachment is provided as the accessory tool. Here, the cutter attachment refers to an attached tool having a function of cutting a wire, an iron plate or the like by using the rotation of the connecting portion of the link body 3.

  In the invention of claim 1, the accessory tool can be detachably provided to the pantograph type hydraulic jack so that the accessory tool can be usually removed and used as a normal hydraulic jack. By attaching, using the rotation of the connecting portion of the lower arm 31 and the upper arm 32 by hydraulic pressure, it is possible to work with the attached tool.

  In other words, the pantograph type hydraulic jack purchased at home can be used universally with the attached tool, and various operations that cannot be performed manually can be performed.

  In the invention of claim 2, by using the accessory tool as a spreader attachment, the hydraulic jack can be utilized as a small hydraulic spreader. This is particularly useful during a disaster or accident. Further, it can be driven by the hand pump 12 without requiring a power source or fuel.

  In the invention of claim 3, the hydraulic jack can be used as a small hydraulic cutter by using the attached tool as a cutter attachment. This is particularly useful during a disaster or accident. Further, it can be driven by the hand pump 12 without requiring a power source or fuel.

  The present invention will be described based on the illustrated embodiment of the pantograph-type hydraulic jack. As shown in FIGS. 1 to 2, the hydraulic jack according to the present invention basically also includes the above-described FIG. 3 and FIG. The hydraulic jack shown in FIG.

  Therefore, where the configuration is the same as that of a conventional hydraulic jack, a detailed description thereof will be omitted unless necessary, and the features that are characteristic of the present invention will be described below.

  FIG. 1 is a perspective view of a jack portion 2 of a pantograph type hydraulic jack showing a state in which a spreader attachment 4 is attached as an accessory tool. Although not shown, the pressure oil supply / discharge portion 1 is integrally provided.

  The spreader attachment 4 includes a spreader upper member 41 and a spreader lower member 42. In the state shown in the figure, the spreader upper member 41 is fixed to the upper arm 32, and the spreader lower member 42 is fixed to the lower arm 31 by a detachable pin 43. Yes. It should be noted that any attachment structure may be employed as long as it can be detachably attached, for example, with bolts and nuts.

  In the illustrated state, the spreader upper member 41 includes a C-shaped cross-section body 41a and two claw portions 41b, and the spreader lower member 42 includes a C-shaped cross-section body 42a and three claw portions 42b. Become. The claw portions 41b and 42b of the spreader upper member 41 and the spreader lower member 42 intersect with each other, and when the link body 3 is contracted, the claw portions 41b and 42b are closed and set so that the link body 3 extends and opens. Has been.

  For example, when a person is trapped in the vehicle without opening the door due to a traffic accident, the link body 3 is contracted, that is, the claw portions 41b and 42b are closed, and the claw portions 41b and 42b are placed in the gaps of the door. The link body 3 is extended after inserting. That is, when the claw portions 41b and 42b are opened according to the extension of the hydraulic jack, the gap can be expanded and the door can be opened, and rescue can be performed.

  FIG. 2 is a perspective view of the jack portion 2 of the pantograph hydraulic jack showing a state in which the cutter attachment 5 is attached as an accessory tool. Although not shown, the pressure oil supply / discharge portion 1 is integrally provided.

  The cutter attachment 5 includes a cutter upper member 51 and a cutter lower member 52. In the state shown in the drawing, the cutter upper member 51 is fixed to the upper arm 32 and the cutter lower member 52 is detachably fixed to the lower arm 31 with pins. . It should be noted that any attachment structure may be employed as long as it can be detachably attached, for example, with bolts and nuts.

  The cutter upper member 51 and the cutter lower member 52 are each composed of bodies 51a, 52a and blade portions 51b, 52b having a C-shaped cross section in the illustrated state. The blade portions 51b and 52b of the cutter upper member 51 and the cutter lower member 52 are set so as to be open to each other when the link body 3 is contracted, and so that the link body 3 extends and crosses and closes at a slight interval. Yes.

  Then, in a state where the link body 3 is contracted, that is, in a state where the blade portions 51b and 52b are opened, the object to be cut is applied between the blades, and the link body 3 is extended. That is, by cutting the blade portions 51b and 52b according to the extension of the hydraulic jack, the object to be cut can be cut like scissors.

  Here, the hydraulic cylinder 22 is a single-acting type and generates a thrust only when it is extended. In the spreader attachment 4, a force acts when the claw portions 41b and 42b open, and in the cutter attachment 5, a force acts when the blade portions 51b and 52b are closed.

  In addition, although the hydraulic jack which attached the spreader attachment 4 and the cutter attachment 5 as the accessory tools has been described as an embodiment, it may be a detachable accessory tool that uses the rotation of the connecting portion of the lower arm 31 and the upper arm 32. For example, any attached tool may be attached to the hydraulic jack.

The perspective view of the Example of the pantograph type hydraulic jack by this invention The perspective view of the Example of the pantograph type hydraulic jack by this invention Partial sectional view of a conventional pantograph-type hydraulic jack Hydraulic circuit diagram showing the principle of hydraulic jack

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pressure oil supply / discharge part 2 Jack part 3 Link body 4 Spreader attachment 5 Cutter attachment 22 Hydraulic cylinder 31 Lower arm 32 Upper arm

Claims (3)

  In a hydraulic jack having a pantograph type link body, an accessory tool that uses the rotation of the connecting portion of the lower arm and the upper arm constituting the link body is detachably attached to the upper arm and the lower arm. Hydraulic jack.   The hydraulic jack according to claim 1, wherein the accessory tool is a spreader attachment.   2. The hydraulic jack according to claim 1, wherein the attached tool is a cutter attachment.

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